Automatic shoe machines



Jan. 10, 1956 0. R. HAAS 2,729,837

AUTOMATIC SHOE MACHINES Filed May 28, 1953 2 Sheets-Sheet l Z /Z6 24 2, Q F [in :'//32 O 1 /4 /7 52 w e w a W //a Inventor:

O/(o 7?. fiaas 1 By Ms flier/76y Jan. 10, 1956 o. R. HAAS AUTOMATIQ SHOE MACHINES 2 Sheets-Sheet 2 Filed May 28. 1953 .j lvenfor: CH0 7-). Haas By Ms flfmmey United States Patent AUTOMATIC SHOE MACHINES Otto R. Haas, Wenham, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application May 28, 1953, SerialNo. 358,047

9 Claims. (Cl. 12-17.2)

The present invention relates to machines for operating automatically about the sole margin of a shoe supported on a last, and more particularly to a machine, the operating means for which include sewing devices for securing together the upper and sole of a lasted shoe, the machine as a whole being similar in many respects to that illustrated in United States Letters Patent No. 2,359,662, granted October 3, 1944, upon application of A. R. Morrill. The illustrated embodiment of the invention comprises an improvement in a prior machine disclosed in United States Letters Patent No. 2,723,633, granted November 15, 1955, in the name of the present inventor, in which there is provided a shoe supporting jack and actuating mechanisms therefor including a pattern cam shaft for imparting positioning and feeding movements to the jack to cause the jacked shoe to be presented to the operating means and to transfer the point of operation about the shoe as it is fed, the stopped position of the pattern cam shaft of the patented machine being controlled in part by a detent rendered active while the pattern cam shaft is coming to rest at the end of an operation of the machine to prevent displacement from uniform stopping position of the pattern cam shaft.

The objects of the present invention are to simplify and further to improve the construction and mode of operation in the automatic machine disclosed in Patent No. 2,723,633 referred to, and to enable a more accurate and reliable control to be exercised on the movements of the pattern cam shaft both while the machine is operating upon a shoe and while certain auxiliary operations are being performed to prepare the machine for a subsequent operation. i

In the machine of inventors prior patent the pattern cam shaft for causing a shoe to be presented to the operating means is blocked from rotation beyond a predetermined limit by the detent, and a brake in that machine assists in stopping rotation of the pattern cam shaft and minimizes rebound from the detent. To start the subsequent operation ona shoe, connections are provided between the detent and a link actuated by the operator in starting the machine to withdraw the detent from a position blocking rotation of the camshaft, the brake having been rendered inoperative just before the detent blocks the cam shaft. Thus it is necessary to provide accurate control and timing of the brake and detent with relation to rotation of the cam shaft at the end of an operation on a shoe. For this purpose the brake is actuated by auxiliary mechanism which also advances the pattern cam shaft to its starting position after the operation on a shoe is completed.

In carrying out the present invention a machine of the type referred to has been provided with an improved form of brake which, when actuated by the auxiliary pattern cam advancing mechanism, is effective of itself to stop rotation of the cam shaft promptly and the detent for blocking rotation of the pattern cam shaft has been eliminated. The brake is actuated directly by connections between a starting treadle for themachine and the brake, so that the necessity for accurately timed relationships between operations of both the brake and blocking detent of the prior machine are no longer necessary. For this reason it is possible to provide a more adaptable construction with greater simplicity and with less expensive construction. Preferably, the machine is equipped with pattern cam shaft reversing mechanism and the brake also is actuated through connections with the reversing mechanism to release the pattern cam shaft for free rotation when the reversing mechanism is thrown into operation.

Features of the invention include also the devices, combinations and arrangements of parts hereinafter described and claimed, which together with the advantages to be obtained thereby will readily be understood from the following detailed specification, taken in connection with the accompanying drawings, in which:

Fig. 1 is a view in right side elevation of a machine partly broken away and shown in section, which view embodies the several features of the invention and illustrates a shoe also partly in section taken at the point of operation;

Fig. 2 is a sectional view on an enlarged scale of the pattern cam shaft brake employed in the machine of Fig. 1;

Fig. 3 is a sectional plan on the same scale as Fig. 2 of portions of the pattern cam shaft with its driving mechanism and brake controlling connections;

Fig. 4 is a sectional view of the pattern cam shaft brake and some of its controlling connections, taken along the line IV-IV of Fig. 3;

Fig. 5 is a detailed view in rear elevation and partly in section of the brake and its controlling connections; and

Fig. 6 is a detailed view in right side elevation of auxiliary, reversing and secondary driving clutches for the pattern cam shaft shown in normal running positions.

The automatic machine illustrated in the drawings is constructed for sewing the inseams of Goodyear welt shoes and comprises a hollow column-shaped support or frame made up of several parts, including a floor section 2 housing a controlling foot treadle 4, a midsection 6 housing a shoe supporting jack, a pattern cam controlled actuating mechanism for moving the jack and a head section 8 housing welt sewing and driving and stopping mechanisms for the machine.

The operating devices for sewing include a curved hook needle 10, a work feeding channel guide 12, a take-up 14 and a Welt guide 15. The stitch forming devices are actuated by a sewing shaft 16 to which are secured several cam disks 17. The supporting frame for the jack is indicated at 18 and the jack is provided with the usual shoe clamping and locking parts. For actuating the jack through its positioning movements during operation of the machine, the jack is mounted upon a structure comprising links and levers 19 pivotally mounted one upon another in the midsection 6 and the actuating structure is provided with rolls engaging one set of a series of earns 20 secured to a vertical pattern cam shaft 22 rotating in the midsection 6 of the frame. During operation of the machine on a shoe the pattern cam shaft is given nearly a complete 360 rotation through a forward driving clutch composed of a toothed driving ratchet member 24 at the lower end of a vertically arranged drive shaft 25 and a cooperating driven clutching member 26 connected to a shoe size adjustable mechanism 28, carried by a vertically disposed stub shaft 30 rotatable with a driving gear 32. The driving gear 32 meshes with a gear 34 to which is attached a smaller gear 36, the gears 34 and 36 providing a speed reduction. The gear 36 in turn meshes with a larger gear 38 on a vertical driving shaft 40 carrying a number of smaller driving gears 42 meshing in turn with a pattern cam shaft gear 44 secured to the shaft 22.

The driving and stopping mechanism includes a gear 45 (upper part of Fig. l) forming an external coned clutch member acting as the driving element of a main driving clutch,. rotating loosely' about the vertical shaft 25. Connected for rotation with the driving clutch mernber 45 is a driven internal clutch member 46, having spiral gear teeth out in its periphery which mesh with similar teeth on one of the cam disks 17. The clutch member 24, beingsecured to the lower end of the drive shaft 25,. is brought to. rest whenever the clutch 45, 46 is disengaged. Thus both the stitch forming devices and the pattern cam shaft are brought to rest in a manner more fully described -in-theMorrill patent, the main driving; clutchbeing disengaged at the end of an operation on a shoe. 7 r

Forsettingthe driving mechanism into operation, the treadle 4. is formed on a lever fulcrumed on'a shaft 47 in the floor section 2 of the machine and the leverfor .treadle 4 is pivotally connected to the lowerend of a rod 48 passing at its upper end through the fork of a forked arm 50. Above the arm 50 on the rod is a coil spring 52 engaged at its lower end with a washer 54 on the rod and at its upper end with a washer 56 secured in place by check nuts 58 on the rod. The arm 50 is secured to a shaft 68 rotatable in the head section 8 and is connected to the main driving clutch 45, 46 within the head section. After the machine is started the treadle rod 48 is held latched in driving position until the operation-is completed or until an improper operation is performed, the main clutch then being disengaged.

After a sewing operation on a shoe has been completed and the stitch forming devices and pattern cam shaft have been brought to rest by the action of the stopping mechanism in releasing the treadle rod 48 from its latch, auxiliary mechanism operates to sever the welt and the sewing thread closeto the last stitch inserted in the shoe and returns the jack to its original starting position. For this reason the pattern cam shaft is not driven through a complete 360 rotation until after the auxiliary operations are completed and the rotation of the pattern cam shaft is thereafter completed without rotating the sewing shaft 16.

To enable the pattern cam shaft to be rotated without roating the sewing shaft the ratchet clutch member 24 is disengaged from its co-operating member 26. The hub of clutch member 24 has a radiai groove within which projects rollers carried by a forked shifting lever 61. The shifting lever 61, accordingly is raised to disengage the clutch 24, 26 by the stopping mechanism. The machine also is provided with mechanism for stopping the operation of both the sewing shaft and the pattern cam shaft Whenever the stitch forming devices operate improperly. Whenever the machine is brought to rest as a result of an improper operation, rotation of the pattern cam shaft is not completed, but the pattern cam shaft remains in its partially rotated position. To enable the improper sewing operation to be corrected, it is necessary to reverse rotation of the pattern cam shaft while the clutch 24, 26 is disengaged, thereby returning the shoe to a position in advance of the improper operation. To do this the machine of the prior Morrill patent has a manual control lever acting when moved to one position to actuate a reverse driving gear, and when moved into another position to disconnect the pattern cam shaft from the sewing shaft without reversing rotation of the pattern cam shaft, so that the sewing shaft may be operated independently whenever adjustments are required in the stitch forming devices. In order to determine which type of control will be effected by the manual control lever of the machine of the Merrill patem, a separate manually operated detent lever for selecting the position of thecontrol lever is provided, which detent lever requires a separate movement to be imparted to it before the manual control lever is moved.

For completing rotation of the pattern cam shaft to bring it accurately into proper starting position in prep aration for operations on a new shoe, after the previous operation is completed, the auxiliary mechanism referred to above and to be described further, is thrown into operation automatically as the sewing machine is brought to rest, the pattern cam shaft also being disconnected from the sewing shaft. The auxiliary mechanism'is similar to that described in Patent No. 2,359,662, and includes an eccentric operated, vertically disposed rockshaft 62 (see Fig. 3), carrying an arm 64 upon which is pivotally mounted at.66 a wide-faced pawl 68. After an operation on a shoe has been completed, the rockshaft 62 is rotated in a clockwise direction, as viewed in Fig. 3, and the pawl 68 is caused to slide yieldingly along a plate 70 secured to the gear 44 on the pattern cam shaft until the pawl 68 slides behind aprojection 72 on the plate- 70. When the shaft 62 is rocked in a reverse counterclockwise direction the cam shaft is advanced to its final stopping position, which'position is maintained until the machine is again restarted for operating upon a new shoe. The advancing movement of the pawl 68 is sufliciently rapid to cause the cam shaft 22 to overthrow if the bearings and actuated parts are sufliciently free'of friction. In the machine of the prior Patent No. 2,723,633 a separately operated detent limits the movement of the pattern camshaft and prevents overthrow. In addition to the detent, the prior machine of Patent No. 2,723,633 has a rotation retarding brake "which comes into operation in a manner to prevent severe impact on the detent and subsequent rebound. Actuation of both the detent and the brake requires that the two be interconnected and that careful relative adjustments be made therebetween. Also, the brake is held out of operation at all times except at the end of a seam so that improper rotation of the pattern cam shaft may be possible at other times.

In the machine of the present invention the pattern cam shaft 22 is brought to an accurately stopped position without the use of' a detent and its separate actuating mechanism. In the'illustrated machine a powerful, quick acting brake only is provided which is effective for bringing the pattern cam shaft to rest under the action of the pawl 68, merely by frictional force alone, a single actuating mechanism therefor being sufficient. The brake also is effective at all other times when the machine is stopped to' hold the pattern cam shaft against improper rotation. As in the machine of the prior Patent No; 2,723,633 the brake is controlled by the auxiliary patterncarn'advancing mechanism so that the brake is applied'at the proper time for effective 'results. In the illustrated machine, however, the brake also is controlled by the connections to the-startingztreadle 4-, the treadle connections beingarranged to cause the brake to be reapplied to the pattern the invention is embodied in a machine'having a mechi anism for reversing rotation of the pattern cam shaft in which additional brake control connections are provided connected with "the reversing mechanism. Preferably, the machine is equipped with a simplified andimprovcd manually actuated 'leverfor controlling the reversing mechanism.

The patterncam shaft brake by reason of its construction and manner of operation is particularly well fitted for bringingthe cam shaft to rest quickly and for holding it in stopped position. The brake comprises an internal conical surface on the gear 34 into which fits a brake member 74 (see Fig. 4) The brake member is secured against rotation, but is slidable vertically toward and from engagement with the gear 34. For this purpose the brake'member is mounted loosely on an enlarged-portion of a shouldered sleeve 76, which also forms a shaft about which: the gear 34 rotates. The upper end of'the sleeve 76 is mounted :in a .bossion the midsection 6 of the machine frame and the lower end is supported in an opening of a bracket 78 secured to the midsection. To retain the sleeve 76 in a fixedposition, the upper end is threaded to receive a clamp nut 80 acting against a washer 82 having a sleeve portion and a pin 83 extending parallel to the sleeve 76 arranged to enter an opening in the midsection of the frame, thus preventing rotation of the washer. The nut 80 when tightened draws a shoulder of the sleeve against the underside of the boss in which the sleeve is mounted and prevents displacement of the pin 83 from its opening.

To prevent rotation of the brake member 74 the enlarged portion of the sleeve 76 has a diametric slot 84 through which passes a pin 86 disposed at its ends in internal notches inside the brake member (see Fig. 2). To assist further in preventing rotation of the brake member the sleeve 76 has fixed within it in parallel relation to the pin 86, a second pin 88 entering at its endswithin additional internal notches in the brake member.

For actuating the brake member 74 toward and from the gear 34, connections between the auxiliary pattern cam shaft advancing mechanism and the brake member are provided. These connections comprise a cam 90 (see Fig. 3) formed on a segment projecting from the hub of the arm 64, the under surface of the segment forming the active part of the cam. The active surface of the cam 91) is engaged by a follower or roll 92 rotatably mounted on an extended extremity of a yoke 94 pivotally mounted on a horizontal pin 96 supported in a lug at one side of a circular ended plate 98. The plate 98 has a perforation through which the lower end of the sleeve 76 passes and is secured to the underside of the enlarge ment on the sleeve by a pair of screws 1194) (Fig. 4). The yoke carries a pair of diametrically disposed pins 162 engaging slots at opposite sides of the hub on the brake member 74. To press the brake member 74 upwardly against the gear 34, there are four compression springs 104 (see Figs. 2, 4 and mounted within axial recesses in the brake member and having their ends supported by the plate 98. When the brake member engages the gear 34, overthrow or free rotation of the pattern cam shaft driving gear train is stopped and the pattern cam shaft is held securely in stopped position.

To release the pattern cam shaft from the brake for rotation, the yoke 94 is swung about its mounting pin 96 to bring the pins 102 downwardly against the lower surfaces of their slots in the brake member compressing the springs 104. For this purpose the active surface of the cam 90 is cut with a spring compressing portion 106 and a spring relieving portion 108. When the auxiliary mechanism is thrown into operation and the rockshaft 62 is rotated in a clockwise direction, the brake member is disengaged from the gear 34 as soon as the roll 92 contacts the spring compressing portion 106 of the cam surface, releasing the pattern cam shaft for rotation by the pawl 68. As the shaft 62 rocks in a counterclockwise direction to complete the operation of the auxiliary mechanism the brake is held released until the pattern cam shaft reaches its final stopping position, at which time the roll again contacts the surface 108 of the cam 90 and the brake is reapplied.

The connections between the starting treadle 4 and the pattern cam shaft brake member 74 include the treadle rod 48, a collar 110 on the treadle rod, and a lever 112 having a forked arm surrounding the treadle rod and engaging the collar 110. The lever 112 has a fulcrum pin 114 mounted in a portion of the bracket 78 and on an upstanding arm of the lever is a rotatable roll 116 engaging a laterally. projecting arm of the yoke 94. When the treadle 4 is depressed the lever 112 causes its roll to raise the arm of the yoke 94 and to depress the brake member 74, disengaging it from the gear 34 so that when the treadle is depressed and the machine is started the pattern cam shaft may rotate without excessive resistance. When the treadle is released a spring 117 connected to the lever 112 causes its roll to disengage the yoke 94 causing the brake to be reapplied.

The illustrated machine is provided with a manually actuated pattern cam shaft reversing mechanism similar to that of the prior Morrill patent, except that the present control lever is more readily manipulated through simple direct movements selectively to reverse rotation of the pattern cam shaft or to disconnect the gear train between the pattern cam shaft and the sewing devices than in the patented machine. As a result the sewing devices may be operated Without rotating the pattern cam shaft, there being no necessity for actuating a separate selecting lever.

Briefly, the pattern cam shaft reversing mechanism comprises a reverse driving gear 118 meshing with the gear 36 which forms part of the driving gear train for the pattern cam shaft 22. The gear 118 is secured to the lower end of a shaft 120 rotating in the frame of the machine, which shaft has formed at its upper end a ratchet-toothed reverse clutch member 122. The reverse clutch member 122 is engaged by a vertically shiftable driving clutch member 124, keyed to turn with the slide axially upon a continuously driven shaft 126. The driving clutch member 124 also is pressed against an auxiliary operation clutch member 128 at the end of a scam in a shoe by the stopping mechanism, but is held out of engagement with the reverse clutch member 122 normally by a forked clutch shifting lever 130 mounted for limited turning movement on a horizontal rockshaft 132. The shifting lever 130 has rollers engaging an annular groove in the clutch member 124 and is urged into a raised position by a coil spring 134 (see Fig. l) surrounding the shaft 132 and engaging at one end with a fixed part of the machine frame and at the other end with a pin on a manually controlled lever 136 secured to the shaft 132.

To prevent unintentional disengagement of the pattern cam shaft driving clutch member 24 from its cooperating member 26 according to a feature of the invention, the lever 136 has pivotally mounted upon it at 138 a dog 140 arranged to swing in a plane parallel to the path of the lever to engage a stop pin 142 mounted on a plate 144 secured to the machine frame. The dog 140 when in engagement with the pin 142 rests upon a second pin 146 in the lever 136. This is the position of the lever shown in Fig. 1 during normal sewing operations of the machine, the pattern cam shaft being driven forwardly through the clutch members 24 and 26.

When it is found necessary to reverse rotation of the pattern cam shaft without moving the sewing shaft, the handle end of the lever 136 is actuated downwardly through a limited movement against the force of the spring 134, pressing the driving clutch member 124 against its reverse member 122. When the desired po sition of the pattern cam shaft is reached, the control lever is released until its movement is stopped by engagement of the dog 140 with the pin 142. When the pattern cam shaft is reversed the clutch members 2 1 and 26 are disengaged by connections between the control shaft 132 and the shifting lever 61, as described more fully in patent No. 2,359,662. As soon as the lever 136 is released the reverse clutch is disengaged and, as will appear hereinafter, the stop brake is reapplied to the pattern cam shaft.

When it is necessary to disconnect the main sewing shaft 16 from the pattern cam shaft 22 so that the sewing shaft may be rotated without rotating the pattern cam shaft, the range of movement of the control lever 136 is increased by shifting the lever slightly to the right by an operator facing the machine until the dog 14G escapes from the stop pin 142. For this purpose the control lever is constructed as a thin steel bar with considerable lateral flexibility. The dog escapes from the stop pin 142 when it reaches the end of the pin,

wanes? pf a spring 148 tensioned between a pin on the plate 144 and a hooked end of the dog 140. The control lever is then free to rise beyond its normal stopped position under the force of its spring 134 carrying with it the control lever 130 until a position of the driving clutch member is reached just out of engagement with the co-operating auxiliary clutch member 128. This movement of the forked lever and shaft 132 is sufficient toraise the lever'61 and separate the forward driving clutch member 24 from its co-operating member 26 in amanner more fully disclosed in' the Mor'rill patent, the spring 134 holding the control lever raised utitil manually depressed. Under these conditions the pattern cam shaft driving clutch member 24 is disengaged from the clutch member 26 and no rotation is imparted to the pattern cam shaft.

' To limit upward movement of the control lever when the forward driving clutch for the pattern shaft is disengaged, so that the auxiliary driving clutch member 124 will not engage the clutch member 128, the plate 14 has a shoulder 150 located in the path of movement of the pin 146, the auxiliary clutch members 124 and 128 being engaged only at the completion of a sewing operation by automatically actuated mechanism more fully described in Merrill Patent No. 2,359,662.

' In order to reverse rotation of the pattern cam shaft after the main sewing shaft 16 is disconnected from the pattern cam shaft by the upward movement of the manually controlled lever 136, the lever 136 is manually depressed until the dog 140 is engaged with and moves downward past the pin 142. To prevent the dog from moving out of the range of the pin 142 without engaging it the spring 148 is so connected to the dog and the spring engaging pin on the plate 144 is so located that during downward movement of the lever 136 the dog snaps beneath the pin 142. Upon releasing the control lever the dog engages the pin 146 on the control lever in the usual. way.

To release the pattern cam shaft from the brake 74, 34 during manually controlled reverse rotation of the pattern cam shaft, the rockshaft 132 has secured to it 7 7 an arm 151 overlying a plunger 152 passing axially through the sleeve '76. The lower end of the plunger 152 rests upon the pin 86 which in turn has its ends supported in notches in the brake member 74. As the control lever 136 is being depressed the arm 151 engages the plunger 152 and disengages the brake member 174 from the gear 34. Thus, it is apparent that there are three sets of connections for disengaging the brake member from the gear 34, namely, a set actuated by the auxiliary mechanism, a set actuated by the foot treadle 4, and a set actuated by the manually controlled lever 136 in the reversing mechanism. a

The nature and scope of the invention having been indicated and a particular embodiment having been described, what is claimed is:

l. An automatic shoe machine having means for operating upon a shoe, a shoe supporting jack relatively movable to transfer the point of operation about the sole margin of a shoe supported on the jack, actuating mechanisms for the jack including a pattern cam shaft, driving and stopping mechanism for bringing the machine to rest at the end of an operation on a shoe, a treadle for controlling the driving and stopping mechanism, auxiliary mechanism thrown into operation when the stopping mechanism is actuated for completing rotation of the pattern cam shaft, and a brake actuated by the auxiliary mechanism for stopping rotation of the pattern cam shaft under the action of the auxiliary mechanism, in combination with connections between the treadle and the brake for releasing the pattern cam shaft from the brake when the treadle is depressed.

r 2. An automatic shoe machine having means for operand stopping mechanism for bringing the machine to rest at the end of an operation on a shoe, a treadle for controlling the driving and stopping mechanism, auxiliary mechanism thrown into operation when thestopping mechanism is actuated for completingrotation of the pattern cam shaft, including a rockshaft and a cam on the reckshaft, a brake for stopping rotation of the pattern camshaft under the action of the auxiliary mechanism, in combination with a follower engaging the cam on the rockshaft for releasing the pattern cam shaft from the brake when the auxiliary mechanism is thrown into operation, and for reapplying the brake to the pattern cam shaft as the auxiliary mechanism completes its operation.

3. An automatic shoe machine having means for operating upon a-shoe, a shoe supporting jack relatively movable to transfer the point of operation about the sole margin of a shoe supported on the jack, actuating mechanisms for the jack including a pattern cam shaft, driving and stopping mechanism for bringing the machine to rest at the end of an operation on a' shoe, a treadle for controlling the driving and stopping mechanism, auxiliary mechanism thrown into operation when the stopping mechanism is actuated for completing rotation of the pattern cam shaft, including a rockshaft and a cam on the rockshaft, a brake for stopping rotation of the pattern cam shaft under the action of the auxiliary mechanism, in combination with a follower engaging the cam on the rockshaft for releasing the pattern cam shaft from the brake when the auxiliary mechanism is thrown into operation, and for reapplying the brake to the -pattern cam shaft as the auxiliary mechanism completes its operation, and other connections between the treadle and the brake for releasing the pattern cam shaft from the brake when the treadle is depressed.

4. An automatic shoe machine having means for operiliary mechanism thrown into operation when the stop-' ping mechanism is actuated for completing rotation of the pattern cam shaft, mechanism for reversing "rotation of the pattern cam shaft and a brake actuated by the auxiliary mechanism for stopping rotation of the pattern cam shaft as the auxiliary mechanism'completes'its oper ation, in combination with connections between the pattern cam shaft reversing mechanism and the brake for releasing the pattern cam shaft from the brake when the reversing mechanism is thrown into operation.

5. An automatic shoe machine having means for-operating upon a shoe, a shoe supporting jack relatively movable to transfer the point of operation about the sole margin of a shoe supported on the jack, actuating mechanisms for the jack including a pattern cam shaft, driving and stopping mechanism for bringing the machineto rest at the end of an operation on a shoe, a treadle for controlling'the driving and stopping mechanism, auxiliary mechanism thrown into operation when the stopping mechanism is actuated for completing rotation of the pattern cam shaft, mechanism for reversing rotation of the pattern cam shaft and a brake actuated by the auxiliary mechanism for stopping rotation of the pattern cam shaft as the auxiliary mechanism completes its operation, in combination with connections between the pattern cam shaft reversing mechanism and the brake for releasing the pattern cam shaft from. the brake when the reversing mechanism is thrown into operation, and other connections between the treadle and the brake for releasing the pattern cam shaft from the brake when the treadle is,

depressed.

6. An automatic shoe machine having means for operating upon a shoe, a shoe supporting jack relatively movable to transfer the point of operation about the sole margin of a shoe supported on the jack, actuating mechanism for the jack including a pattern cam shaft, driving and stopping mechanism for bringing the machine to rest at the end of an operation on a shoe, a treadle for controlling the driving and stopping mechanism, auxiliary mechanism thrown into operation when the stopping mechanism is actuated for completing rotation of the pattern cam shaft, including a rockshaft and a cam on the rockshaft, a brake for stopping rotation of the pattern cam shaft under the action of the auxiliary mechanism,

in combination with a follower engaging the cam on the rockshaft for releasing the pattern cam shaft from the brake when the auxiliary mechanism is thrown into operation, and for reapplying the brake to the pattern cam shaft as the auxiliary mechanism completes its operation,

and other connections between the treadle and the brake for releasing the pattern cam shaft from the brake when the treadle is depressed, the treadle connections being arranged to cause the brake to be reapplied to the pattern earn shaft when the treadle is released.

7. An automatic shoe machine having means for operating upon a shoe a main frame and an actuating shaft in the main frame for actuating the operating means, a shoe supporting jack relatively movable to transfer the point of operation along the sole margin of a shoe supported on the jack, an actuating mechanism for the jack, a pattern cam shaft for the actuating mechanism connected for rotation with the actuating shaft and a clutch for disconnecting the pattern cam shaft from the actuating shaft, driving and stopping mechanism for bringing the machine to rest at the end of an operation on a shoe,

auxiliary mechanism thrown into operation when the stopping mechanism is actuated for completing rotation of the pattern cam shaft, a treadle for controlling the driving and stopping mechanism, mechanism for reversing rotation of the pattern cam shaft, and a brake for stopping rotation of the pattern cam shaft, in combination with three sets of connections for disengaging the brake from the pattern cam shaft, including a set actuated by the auxiliary mechanism, a set actuated by the treadle, and a set actuated by the pattern cam shaft reversing mechanism.

8. An automatic shoe machine having means for operating upon a shoe, a main frame and an actuating shaft in the main frame for actuating the operating means, a shoe supporting jack relatively movable to transfer the point of operation along the sole margin of a shoe sup ported on the jack, an actuating mechanism for the jack, a pattern cam shaft for the actuating mechanism connected for rotation with the actuating shaft and a clutch for disconnecting the pattern cam shaft from the actuating shaft, driving and stopping mechanism for bringing the machine to rest at the end of an operation on a shoe,

auxiliary mechanism thrown into operation when the stopping mechanism is actuated for completing rotation of the pattern cam shaft, mechanisms for actuating the disconnecting clutch to disconnect the pattern cam shaft from the actuating shaft and for reversing rotation of the pattern cam shaft, a manually actuated laterally flexible lever for controlling the disconnecting clutch and the reverse mechanism, in combination with means mounted on the lever and the machine frame for rendering the lever operative selectively to control the disconnecting clutch and reverse mechanism, comprising a dog pivotally mounted on the lever to swing in a plane parallel to the path of the lever and a pin on the machine frame arranged to be engaged by the dog to stop the control lever in a position before disengagement of the pattern cam shaft disconnecting clutch occurs, the lateral flexibility of the lever eing sufficient to move the dog to a position where it escapes the pin on the frame.

9. An automatic shoe machine having means for operating upon a shoe, a main frame and an actuating shaft in the main frame for actuating the operating means, a shoe supporting jack relatively movable to transfer the point of operation along the sole margin of a shoe supported on the jack, an actuating mechanism for the jack, a pattern cam shaft for the actuating mechanism connected for rotation with the actuating shaft and a clutch for disconnecting the pattern cam shaft from the actuating shaft, driving and stopping mechanism for bringing the machine to rest at the end of an operation on a shoe, auxiliary mechanism thrown into operation when the stopping mechanism is actuated for completing rotation of the pattern cam shaft, mechanisms for actuating the disconnecting clutch to disconnect the pattern cam shaft from the actuating shaft and for reversing rotation of the pattern cam shaft, a manually actuated lever for controlling the disconnecting clutch and the reverse mechanism, in combination with means mounted on the lever and the machine frame for rendering the lever operative selectively to control the disconnecting clutch and reverse mechanism, comprising a dog pivotally mounted on the lever, a pin on the machine frame arranged to be engaged by the dog to stop the control lever in a position before disengagement of the pattern cam shaft disconnecting clutch occurs, said manually actuated lever being constructed of thin material with lateral flexibility to enable the lever to be shifted laterally until the dog escapes the pin for movement beyond its stop position, and a pin on the lever to stop the movement of the dog as the dog engages the pin on the machine frame.

References Cited in the file of this patent UNITED STATES PATENTS 1,458,013 Tampier June 5, 1923 1,497,612 Sweeny June 10, 1924 1,781,156 Brown Nov. 11, 1930 2,359,662 Morrill Oct. 3, 1944 

